Photometric evidence of the multiplicity of stellar populations in globular clusters

被引：1
|
作者：
Gerashchenko, A. N. [1 ]
机构：
[1] Russian Acad Sci, Main Pulkovo Astron Observ, Moscow 117901, Russia
来源：
ASTROPHYSICS | 2013年 / 56卷 / 02期
关键词：
stellar systems; globular clusters; color-magnitude diagrams; DOUBLE MAIN-SEQUENCE; PECULIAR HORIZONTAL-BRANCH; SAGITTARIUS DWARF GALAXY; NA-O ANTICORRELATION; OMEGA-CENTAURI; RED GIANTS; ABUNDANCE VARIATIONS; SUBGIANT BRANCH; SELF-POLLUTION; HELIUM SPREAD;
D O I：
10.1007/s10511-013-9286-5
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
A constantly increasing number of photometric and spectral observations over the last decade indicates that many globular clusters have distinct stellar sub-populations and has seriously challenged the paradigm of globular clusters as stellar systems consisting of stars the same age and chemical composition. These multiple populations show up as a splitting (broadening) of the evolutionary sequences on color-magnitude diagrams and as star-to-star abundance variations. This review examines the photometric evidence for the multiplicity of stellar populations in globular clusters and summarizes some of the characteristics of these populations that can be derived from photometric observations.
引用
收藏
页码：271 / 303
页数：33
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